Improvement in air-heating and ventilating furnaces



s. w. KlMB LE.

Air-Heating and Ventilating Furnace.

PatentedMay 25,1875.

WITNESSES ATTORNEYS.

YHE GRAPHIC COJNOTO-LITHJQBufl PARK PLACEJLY.

UNITED STATES PATENT OFFICE.

SMITH W. KIMBLE, OF SPRINGFIELD, ILLINOIS, ASSIGNOR OF THREE- FOURTHS HIS RIGHT TO ARTHUR LEGGOTT, SILAS W. HIOKOX, AND AUGUSTIN RAFTER, OF SAME PLACE.

IMPROVEMENT IN AIR-HEATING AND VENTILATING FURNACES.

Specification forming part of Letters Patent No. 163,786, dated May 25,1875 application filed April 14, 1875.

out in the claims.

A represents the shell of furnace, made preferably of boiler-iron, with circular top, sides drawn in, and riveted heads. Bis the ash-chamber, having door b, and over this the grate O and cornbustionchamber D. e is adrop-door in the neck or throat E, between feed-door d and door I) of the ash-pit. The ash-pit and combustion-chamber are thus so connected that the clinkers and unconsumcd coal that will not pass the grate may be raked into this throat, and then discharged into the ash-pit. This door is held by the detachable rod F, which extends to the outside, and is readily manipulated. This furnace is surrounded by a brick or other casing, in the usual manner. Through the combustion-chainber D I pass the crescentshaped tube G, which connects at its front end 9 with the cold-air pipe, and at the other end opens into the hotair case. H is a plate, which'connects the crescent tube with side of shell, passes down, on the right, below the mouths of dues I I, but leaves a clear inlet for the products of combustion on the left side, the said products being thus compelled to travel all around the air-tube G before they find an exit through fines I I. The air thus abstracts a very great proportion of their caloric before they pass from the furnace. The fines I are bent around over the furnace, and empty into a horizontal pipe, K, that rests loosely upon brackets L. One end of pipe K connects with the smokeflue, while the other receives a detachable cap, k, whereby the pipe may be caused to receive the cooled pieces of unconsumed matter, and be readily cleaned by a suitable scraper, or other suitable device. The flues I are, through the pipe-connection K, which is unt'astened, allowed to expand and contract without difficulty or liability of injury to the joints.

Having thus described my invention, What I claim as new is- 1. The throat E, connecting the combustionchamber and ash-pit, provided with drop-door e, as and for the purpose described.

2'. The flues I, connecting on one side of furnace with combustion-chamber, passing over it, and on the other side attached to a pipe, K, resting loosely on brackets L, as and for the purpose described.

SMITH W. KIMBLE.

Witnesses:

WM. P. GRIMSLEY, J. O. LANPHIER. 

